Use a 512 bytes buffer for the fill operations #9
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dhalbert
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Nov 3, 2017
adafruit_rgb_display/rgb.py
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| h = min(self.height - y, max(1, height)) | ||
| self._block(x, y, x + w - 1, y + h - 1, b'') | ||
| chunks, rest = divmod(w * h, 512) | ||
| chunks, rest = divmod(w * h, 256) |
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Could you add a comment explaining the buffer choice size?
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I moved it into a constant and added explanation.
dhalbert
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Nov 3, 2017
adafruit_rgb_display/rgb.py
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| chunks, rest = divmod(w * h, 256) | ||
| pixel = self._encode_pixel(color) | ||
| if chunks: | ||
| data = pixel * 512 |
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Indeed, I should slow down a little.
Right now we are using 1024 bytes (512 16-bit pixels), and it doesn't really give us any speed advantage, since the DMA buffer is only 512 bytes anyways.
tannewt
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Jan 4, 2018
Updating https://github.com/adafruit/Adafruit_CircuitPython_RGB_Display to 3.0.0 from 2.0.1: > Merge pull request adafruit/Adafruit_CircuitPython_RGB_Display#10 from mrmcwethy/lint > Update to SSD1331 driver (adafruit/Adafruit_CircuitPython_RGB_Display#11) > Merge pull request adafruit/Adafruit_CircuitPython_RGB_Display#9 from deshipu/fix-small-buffer > Merge pull request adafruit/Adafruit_CircuitPython_RGB_Display#8 from deshipu/fix-readinto
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Right now we are using 1024 bytes (512 16-bit pixels), and it doesn't
really give us any speed advantage, since the DMA buffer is only 512
bytes anyways.